Riveting machine



July 8, 1941 H. TH'oMAsoN ylif? RIVETING MACHINE Filed June 3, 1937 4Sheets-Sheet 2 'July 8, 1941. H. 'rHoMAsoN RIVETING MACHINE Filed June3, 1957 4 Sheets-Sheet 3 July 8,194.1- H.' THoMAsoN 2.2485139 RIVETINGMACHINE Filed June 3, 193'?y Y 4 vSheets-Smet 4 Patented Julyv8, 1941ENT OFFICE mmc moms v Thomason, Los Angeles. Application :une s, '1931.semi No. 140.211

(ci. zia-2.1)

` Ultimi. 'I'his invention relates tohimprovements in riveting machinessuch as those as are primarily designed for riveting brake linings tobrake shoes, but which may be used'for other purposes as well. Theinvention primarily concerns improvements in riveting machines of thischaracter having automatic feeds.

An object of the invention is to provide an improved riveting machinesusceptible of receiving and automatically feeding a large number ofrivets of diii'erent sizes and to provide means whereby the operatingmechanism of the machine can be easily and quickly cleared of rivets ofone size and rivets of other sizes substituted therefor.

More specifically, an object of the invention is to provide a rivetingmachine wherein there is a track which feeds the rivets toward the workbetween the punch and anvil of the machine and a rotatable drum whichreceives the'rive'ts and feeds them inproper position onto they trackwherein there is a magazine associated with the drum which mayor may nothave a plurality of separate compartments that lcan be placed incommunication with the drum, the magazine being rotatable so that in oneposition' rivets may be fed therefrom into the drum and in analternative podtion the rivets may be returned from the drum to themagazine without loss.

Another object'of the invention'pertaining to the objectsabove-mentioned, is to provide an improved drum construction which willfacilitate suitable anvil indicated at Il.

of one end of a guide associated with one of the drums oi' the machineand is a view as seen look-v ing down atthe top, of the guide intipositionA substantially as shown in Fig. 5: and

proved brake lining machine.

Referring to the. drawings wherein similar reference acters `designatesimilar parts throughout, the improved brake lipinf; machines comprisesa frame generally designated at Il on which there is mounted a mg. 4v isa front view in elevation of the inn-Y i3 and forces the punch i!downwardly toward anvil II to force the rivet through the workandcause-theanviltorolltheshankoftherivetand to fonna rivet head on thebottom of the rivet.

,Draw rod it is normally urged into uppermost position such as by aspring (not shown).

clearing the drum oi' rivets 'to enable them to be returned to themagazine or its-compartment.

With the foregoing and other objects in view, which will be mademanifest in the' following detailed description, and specificallypointed out in the appended claims, reference is had to the accompanyingdrawings for an illustrative embodiment of the invention, wherein:

Figure 1 is a partial view in side elevation of the improved brakelining machine, illustrating` in dotted lines the position that themagazine may assume in emptying Ithe drum in effecting a change of rivetsizes;

Fig. 2 is a partial view in side elevation of the rear of the machine; l

Fig. 3 is a vertical section taken substantially upon thev line 3 3 uponFig. 1; n

Fig. 3a is an enlarged partial 'section of'the clutch shown in Fig. 3;

Flg.,4 is'a horizontal section taken substanftiall'ylmontheline-luponl'ia 3; V

Fig. 5 is a vertical section taken substantially upon theline I-l ofFig. 3; ,N Fig. 6 is a partial view illustrating the shape 55 Themachine as illustrated, is capable of handlingten different sizes ofrivets but it will be ,understood that by small changes in design alarger number or a smaller number of rivets may be accommodated by themachine.

. A rotary shaft I1 extends transversely across the frame at the backthereof and near its top. On. this shaft there are positioned bushings Il and il anda cam follower 2l. is pivoted for rotation on the inner endsof these bushings and isjarranged in alignment with forcing lever Il.The cam follower carries a roller 2i which is in engagement with thecam-shaped top surface of the forcing lever. Cam follower 2l is providedwith a pivoted pawl 23 which engages a ratchety wheel 24 flxedly mountedonk rotary shaft Il. The purpose` of this'construction is such that whendraw bar Il is pulled downwardly to force the forcing lever downwardlyin the process of riveting. the cam follower 2l may swing .about shaft I1 as a center in a counter-clockwise direction from the position shownin Fig. 1. During this movement pawl 23 merely slips over the teethonthe ratchet wheel Il. When draw bar II not shown, the cam followermoves in a clockwise direction into the position 'shown in Fig. 1

Iny upper aligny and. during this movement pawl 23 engages ratchet wheel24 and imparts rotational movement to shaft I1. The purpose of rotatingshaft ilis to rotate the rivet aligning drums 25 and 2l aswill' be.later described. f

On each bushing 'Il and Il there are positioned washers 21 and magazinesupporting frames 28. The magazine supporting frames are rotatable onrespective drums. They` are held thereon by means ofnuts 29. -framescarry verticallydi'sposed spindles 3|!` on which the magazines 3i arerotatable.A They also carry hoppers 32. Eaich magazine as shown isdivided into ilve oempartments, the compartments illustrated in Fig. 4being indicated atv 3 3,

onef compartment, namely that compartment which is positionedimmediately beneath the hopper.` It will be understood, however, thatbyro be selectively positioned beneathv the' hopper and lrivets placedin the hoppery may be dropped into may be usedy to deposit the .rivetsof all of the closed position islocated beneath the magazine.

rectlythereabove which isbeneath hopper 32 {ca n be droppedy through anoutlet 4 3 and;discharged connected thereto bymeans of asuitable clutch.

.locking dog 45 the 'end of which can be forced against the action ofthes'pring into an aperture inthedrum. The head of 'thelocking' by theinner face of a rotatable ring 41' which is ringl'ihas one ormore-recesses 43 into which the head ofthe locking dog is receivable toallow the ,In the positionv rshown in Fig.,.3/the locking dog 'that thehead on the'dog 45 is forced out of; the

45. In this waythe clutch operatively connects drum2l lwith shaft i1sothat .the drum will be .rotatedin a step-by-stepmanner yevery timethat Vdraw bar i5 is lowered and raised. r

The drum is of thegeneral shape ofa frust of a cone with its large enddisposed inwardly.

the bushings aboutthe center o'f rotation of their.

. 34, 3l, 35, and 31. The outer walls of the compartments may be formedbyglass windows 38 so' whichever compartment of the magazineis posi-`tioned'beneath thehopper." release of handle thationi opening` the' gateformedby plater 39,'

sizes desired into their" respective compartments.` l A similar gatewhich Ajis also spring-actuated into 45 'Ibis gate is formed by plate-42. On openingthe' I kbottom gate 42 the rivets in the compartment diintothe aligning drum 2t. 'rneangning drum 2s. is loosely mounted on shaftl1 but is operatively e.

dog` 45 is engageable y urged inwardly by a spring 48. On its innerface,

recess 49 the dog may be forced to enter aperture 1 assenso y This largeend is provided v'l'he f magazine supporting Y housing. The upper end ofedge 54a"terminates turned to closed position by spring 4 0.'y The gatev is so arranged as to open the bottom of the hopperv 32. and'placelitin communication with only 1 tatingthe magazine anyof its compartments'may A that'compartment. In this way a singleV hopper and this space issulcient toA accommodate the heads of all of the sizes of rivetsthat maybe placed in the magazine. The lengths of the slots 5Iiare' such asA toaccommodate all lengths of the Shanks of all rivet sizes that may beplaced in the magazine. A peripheral guide 52 is secured to and extendspartly around the interior of the housing adjacent the periphery of thedrum. The lower end of such guide 52 terminates at 52a adjacent theoutlet opening 53 inthe wall of the housing formed by the magazinesupporting frame 28. The other end 55 of this guide extends diagonallyas shown in Fig. 6 from the vertical edge 55a`to the opposite verticaledge 55h, this figure illuscord of the circle formed by the periphery ofthe at the edge 55b of the upper end .ofthe periphthus facilitatingshifting ofthe rivets'.

The outlet 53 discharges into the upper end of a track'56 formedbyspaced rails defining a` slot 51.l The magazine fram'e`28 whichisrotatable about the axis of rotation of the drum 25 is nor'- A mallyvlocked in the upright position shown in full 'lines of.. Fig. 1. Thisisl accomplished by means of a spring-actuated plunger, the` handle. ofwhich is indicated at 58, Fig. '7. Withdrawal oi?k this plunger releasesthe magazine frame f which is then free to rotate on bushing I8 and maybe swung into the dotted line position shown.."f l 'The purpose of sucha' construction is to enable the emptying of thevdrum of rivetsthereinand thus clear the rivets fromvthe drum which are toI be returned backto their proper compartment in the magazine. For., example, in theposition shown,` if compartment 33 of the magazine has been opened todeposit a supply of'rivets'in the l On the outer end of shaft" I1 thereisa ring 44 locked .thereto and containing a spring retracted spring toretract the locking dog .from llocking engagement withl aperture inthedrum 25..

45 is' retracted'so' that the drum 25 is discony nected from shaft I1.By rotating ring' 4l so f opening 43 intheV magazine frame willbeswung Ainto a position near thebottom of the`drum andi on rotation of the drumthe rivets thatrnay'be in` drum-which iny turn', yare f edby thedruminto slot s1 or the` track and it 1s esired to emptythe drum of thissize of rlvetsp'reparatory to using' rivets of a diiferent size,`thevmagazine is un#y locked by means lo fplunger 58 and 'swung into theAdotted line position. In this vposition the the drum will be caused .toSpill therefrom through opening 43` and back( into the compart-.

to be rotated in eitherdirection.v By rocking the drum back and forthany jammed rivet is usualiy vlifted clear and retnrnedto the magazinecompartment. When the drum has been emptied the i' lower gate formed byplate 42 is opened to allow the rivets to' pass fromopening 43 into'jthecom-1.

. partment. The upper gate 39 is left closed: VThus the rivets that havebeen in the drumare rewith a large number of assenso y turned to theirproper compartment in the magazine. v'I'o substitute rivets of adiuerent size which may be in another compartment of the magazine, themagazine is rotated so as to position the proper compartmenty underneaththe hopper and-over opening Il. The gate 42 is then opened which allowsthe rivets to fall from the compartment into the drum when y'themagazine frame is in the full yline vposition shown in Fig. 1. In thisway a complete change from one size of rivets to another is possible.The changeecan be effected easily and quickly without danger of spillingordropping rivets'. I

A brief rsum of the operation ofthe machine is as follows: The machineis first loaded by placing rivets of different sizesin the' compartmentsof the magazine. To load a compartment with a ygiven size of rivets asupply of the rivets is first placed in one of the hoppers $2, and themagazine is then rotated about its vertical axis so as to position thedesired compartment beneath the outlet from the hopper. The upper gateIl is then opened andthe rivets are permitted to spill or drop from thehopper 32 into the compartment beneath. Obviously, .all fivecompartments of ever it is desired to change from one sizeof rivet to arivet of any ofthe other nine sizes, the rivets each magazine can beindividually loaded with rivets of different sizes in this manner. Whenthe work to be riveted requires a rivet of any ,given size thatcompartment of the magazine which contains rivets of this size ispositioned over the outlet and the lower gate I2 is opened permittingthose rivets which are within the cominto drum 25. The clutch whichconnects the drum 25 with shaft I1 is then engaged so that whenever thetension member Il is pulled downwardly to operate punch I2 and shaft I1is rotated thereby by means of the ratchet 2l, 2|, the drum will berotated. The drum serves to feed the rivets through the outlet Il andinto the slot 51 of the track It will be understood that the shanks ofthe rivets extend through the slot I1 with the heads of the rivetssupported by the rails 5l. The slot Il may thus be completely filledwith aligned rivets fed thereto by the rotatpartment to spill or dropthrough the outlet 43 ing drum. The rivets are maintained on the trackby the escapement mechanism.

'Ihe clutch mechanism connecting drum 2i with shaft I'I may bedisengaged and the drum rotated freely on 'the shaft by hand.y Duringsuch rotation those rivets remaining in the drum and in the drum and onthe track can be quickly returned to their respective compartments. Inother words, thev machine can be very quickly cleared of rivets of onesize andrivets of another size substituted therefor. i y Various changesmay be made in the details of construction without departing from thespirit-or scope of my invention as deilnedin-the appended claims. Iclaim: 1

1. In a riveting machine, a track for feeding rivets toward the work,arotatable drum adapted to receive rivets and feed them into the track,

-and means providing a magazine for the rivets, said means beingassociated with the drum and being movable into positions wherein rivetsmay be optionally emptied from the magazine into the drum or the drummay return rivets into the magazine.

A2. In a riveting machine, a track for feeding rivets toward the work, arotatable drum adapted tp receive rivets and feedv them yinto the track,and meansproviding a magazine rotatable about the axis of rotation ofthe drum into one position wherein rivets may be fed from the magazineinto the drum and into another position wherein the drum may returnrivets to the magazine.

3.V In a riveting machine, a track for feeding rivets toward'the work, arotatable drum adapted to receive rivets and feed them into the track,

- and means providing a magazine rotatable about the axis of rotation ofthe drum into one position wherein rivets may be fed from the magazineinto the drum and into another position wherein the drum may returnrivets to the magazine, there being agate between the drum and magazine.

4. In a riveting machine, a track for feeding rivets toward the work. arotatable drum adapted to receive rivets and feed them into the track,and means providing a magazine rotatable about which have not been asyet fed through outlet 53 to the track are returned to the compartmentthrough outlet 4l, it being understood that gate 42 is held open duringthis return. Gate l2 is thereafter closed and the .magazine returnedfrom the dotted line position shown in Fig. 1 to the full line positionshown in this figure. Thus, all rivets which were in the drum arereturned to their respective compartment.' The rivet holder may be swunginto inoperative position and those rivets which spill from the trackmay be 'caught by hand or in` a container and returned to hopper 32. Theupper gate 3l may then be opened to return these rivets to the samecompartment. The magazine may then be turned about its vertical axis toposition the compartment containing a new type of rivet or rivet of adifferent size over the outlet Il. Then by opening the gate I2 thesupply of rivets in this compartment can be fed into the drum and fedtherefrom onto the track. It will, of course, be understood thatvonlyone vmagazine and its track is used at one time but as each magazine hasfive compartments and each magazine together with its track may be emtheaxis of rotation of the drum intoy one position Awherein rivets may befed from the magazine into the vdrum and into another position whereinthe drum may return rivets tothe magazine, said vmagazine having aplurality of compartments,

each of which may be selectively placed in communication with the drum.

5. In a riveting machine, a track for feeding;

rivets toward the work, a rotatable drum adapted to receive rivetsandfeed them into the track. and means providing a magazine rotatable aboutthe axis oi.' rotation of the drum into one position wherein rivets maybe fed from the magazine into the drum and into another position whereinthe drum may return rivetsto the magazine, said vmagazine having aplurality of compartments.

each of which may be selectively placed in communication with thedrum,and a gate common to all compartments controlling the passage of rivetsbetween the drum and any selected compartment.

6. In a riveting machine, a track, a slotted, rotatable drum adapted toreceive rivets and feed them into the track, means providing a housingaround the drum, and means providin'gvbeveled surfaces adjacent theperiphery and face of the drum for clearing rivets from the slots of the4 'drum durln'gits rotation in emptying rivets theref from.' jg m '7.In'a riveting machine, a rotatable drum for i ascenso aligning rivett.`means providing a magazine over ythe drum fromwhich rivetsI may be fedtothe drum, said magazine having a plurality of com.

tioned so as to feed rivets to the drum, gate means for controlling thefeedingof rivets from a com--y partment-to 1 the drum, and a hopper overthe Y magazine.

8. Invariveting machine. a rotatable drum for aligning rivets, meansproviding `a magazine over the drum from which rivetsYmay-be fed'to'thedrum, saidmagazlne having a plurality of oompartments any ofwhich may beselectively posiv tioned so as to feed rivets to the drum. and gatepartmente any of which'may be selectively 'posimeans for controlling thefeeding of yrivetsy from ya compartment to the drum.

9. In a riveting machine, a' trael: ,fa slottedr tatable drum adaptedto1 receive rivets and'feed them into thetrack, means providing; ahousing around` the drum, and means providing a bevel surface adjacentthe periphery of the ,drum for clearing rivets from the slotsof the drumduring its rotation in emptying rivets therefrom.

l 10. In a riveting'machine, a track, a slottedv rotatable` drumadapted'to receive `rivets and feed them into the track, meanaprovidinga honsing around the drum, y,and means providing' l a bevelled surfaceadjacent' the face of the drum for clearing'rivets from the slot of thedrum dur- -ing its rotation in emptying rivets therefrom.

HJALMAR THOMASON.

